ABC’s Dancing With the Stars drew Monday’s biggest audience with 19.8 million viewers, according to overnight ratings from Nielsen. CBS’ Two and a Half Men may have followed with 13.2 million but won the ad-favored 18-49 demo with a 4.3 rating/10 share. The alphabet network claimed the third spot with Castle nabbing 12.1 million viewers, while CBS rounded out the top-five with two of its more successful new series, Mike & Molly with 10.8 million viewers and Hawaii Five-0 with 10.5 million.